View Compilation Error

0_0_15541936_27944.cpp: In function 'int main()':
0_0_15541936_27944.cpp:14:11: error: 'cin' was not declared in this scope
     while(cin>>n&&n)
           ^
0_0_15541936_27944.cpp:16:9: error: 'cout' was not declared in this scope
         cout<<f[n][0]<<endl;
         ^
0_0_15541936_27944.cpp:16:24: error: 'endl' was not declared in this scope
         cout<<f[n][0]<<endl;
                        ^